Network linkage type private branch exchange system and control method thereof

A method of controlling a network linkage type private branch exchange system including a plurality of private branch exchanges, a plurality of telephone network interfaces for relaying data between a plurality of telephone networks and each said private branch exchange, a plurality of terminal devices for transmitting said data between each said private branch exchange and a plurality of operators, a plurality of computers each connected to each said private branch exchange for conducting predetermined processing based on said data, and a data communication line to which each said private branch exchange is connected, wherein

• said data is transmitted to said computer connected to an arbitrary private branch exchange other than the private branch exchange in question through said data communication line.

A computer readable memory storing a control program which realizes a function of a network linkage type private branch exchange system including a plurality of private branch exchanges, a plurality of telephone network interfaces for relaying data between a plurality of telephone networks and each said private branch exchange, a plurality of terminal devices for transmitting said data between each said private branch exchange and a plurality of operators, a plurality of computers each connected to each said private branch exchange for conducting predetermined processing based on said data, and a data communication line to which each said private branch exchange is connected, wherein

• said control program
• transmits said data to said computer connected to an arbitrary private branch exchange other than the private branch exchange in question through said data communication line.